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The vortex concept

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Medway Maniac View Drop Down
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    Posted: 27 Feb 07 at 6:09pm

Originally posted by Jack Sparrow


How much play in PY are we talking here? And is this for the Assy Vortex
as well?

Sorry Jack, just went back to page 1 to remind myself what this thread was all about, and saw your unanswered question.

I rate boats for displacement, marginal planing (roughly, trapeze-asymmetric boats are, others are not), and 'everybody's planing' conditions.

The Laser 2000, as a hiking boat that prefers some wind, is my datum boat, and has zero correction.

The Vortex A has a -8%, 4% , 4%  corrections, respectively 

The kite-less Vortex is -9%, 3%, 6%

A Contender, is -6%, 0, 6%

Most boats are around + or - 2%, e.g. Laser 4000:  -3%, 2%, 1%.

I don't pretend these figures are scientifically accurate - you'd need to run 100's of races to get near that, but I've tended to under-correct rather than over-correct, bumping up the corrections only when they're clearly inadequate.

As an interesting aside, I started with a 10% spread between novices and experts. Now I'm up to 20% and it's still not enough, especially in tricky conditions!

 

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English Dave View Drop Down
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Post Options Post Options   Quote English Dave Quote  Post ReplyReply Direct Link To This Post Posted: 28 Feb 07 at 10:53am

Originally posted by Hector

BUT The statement above that "sunday no wind and they were no where to be seen" is typical of the exaggerated / misleading comments elsewhere on this thread.

Hector, just because you don't agree with some of the negative comments doesn't mean that you can slam them all as exaggerated and misleading. I got this from you.

Originally posted by Hector

Sorry to say this Dave but you must have been sailing it very badly.

The notion that a Vortex (being even half decently sailed) could be as slow as you describe is quite ridiculous.

Medway got this for his sins:

Originally posted by Hector

Regarding the 6 Vortex at your club, as you possibly know, all bar one of them never has never got in the top half of the open fleet.

So are you saying that the Vortex is only a boat for experts? If so it is never going to succeed in a handicap fleet of mixed boats and abilities. And it was originally marketed as being relatively easy to sail for it's performance.

Laser stopped building the Vortex because not enough people bought them. Perhaps you don't rate opinions of the general boat-buying public either!

English Dave
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49erGBR735HSC View Drop Down
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Post Options Post Options   Quote 49erGBR735HSC Quote  Post ReplyReply Direct Link To This Post Posted: 28 Feb 07 at 12:06pm
Know a few people who bought Vortexs and then decided that cats were a far better option. Not bashing the Vortex but suppose it's horses for courses and for restrictive inland sailing or at clubs with small cat fleets, can see the argument for the Vortex as sailing on handicap against mono's might be more interesting due to there not being a massive gap in handicap between them.
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Hector View Drop Down
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Post Options Post Options   Quote Hector Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 07 at 12:25am
Originally posted by English Dave

Hector, just because you don't agree with some of the negative comments doesn't mean that you can slam them all as exaggerated and misleading.

So are you saying that the Vortex is only a boat for experts? If so it is never going to succeed in a handicap fleet of mixed boats and abilities. And it was originally marketed as being relatively easy to sail for it's performance.

Laser stopped building the Vortex because not enough people bought them. Perhaps you don't rate opinions of the general boat-buying public either!

Why not if they are exaggerated and misleading? Perhaps I'm not as elequent as some on here and have put it badly - Reading it back I was perhaps a bit harsh on you in particular. Perhaps I should have added 'in my experience'. So I guess it is possible to sail a Vortex as slow as a Topper just as I suppose it is say a Contender - in my experience it's very unlikely (and I've provided actual evidence of light wind performance).  To be fair to Spin Cycle, he was a long way ahead on the Sunday at Keilder so he probably wasn't aware how well the Vortex were doing - that doesn't make his comments accurate though.

Of course it's not a boat 'just for experts'. But like any boat it's results will be better when sailed by those from the front half of the fleet.

You may think that's why Laser stopped building them - I think it's because they are a volume selller, they had other problems and changed marketing strategies. It's true they weren't making enough money selling at the volumes involved and yes sales did slow considerably once they stopped marketing the boat - little suprise there. The class is talking to potential new builders right now.

Do I rate the opinions of the general boat-buying public? Do you mean the masses who buy Picos etc? Anyway, if the lack of 'general boat-buying public' buying a particular class means that class is fair game to have 'iffy' statements made about them on here, then I await the onslaught on the dozens of classes with less support than the Vortex.

Tell you what, come and see me on the Vortex stand at the show this weekend, and we'll discuss it over a pint - same goes to you Medway Maniac.

BIG edit in penultimate Para - and apologies to ayone from Cherubs/ IC/ 18' Skiff who may have read original - I didn't mean to drag you into this discussion.



Edited by Hector
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Hector View Drop Down
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Post Options Post Options   Quote Hector Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 07 at 12:58am

Originally posted by Medway Maniac

 I always thought that the Contender needed huge adjustments, but the Vortex is easlily the most extreme in that regard.

Do I read the stats in your post above right?

i.e. Vortex  -8% to +4% ie 'swing of 12%

Contender -6% to +6% i.e. swing of 12%

Am I missing something - or is your statement above a tad  m*********g (self censored for fear of getting told off by E.D.!.) 

BTW I notice Mikes Vortex is second in your series ATM and according to the Y&Y report that's because of his consistent results -  So do you adjusted PYs for all races / days? I'd be interested to hear (perhaps in a new thread) about the swings for various classes, and what classes are most consistent.

Don't forget that offer of a pint.



Edited by Hector
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English Dave View Drop Down
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Post Options Post Options   Quote English Dave Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 07 at 9:36am

Can't make the show (I need an airplane to get there so only do every 2 or three years) so pop the pint in the post!  Or go to the Hurricane stand, buy someone there a pint and tell them they owe me!

What does strike me though on your Kielder race results is that both Phil and Keith dropped six places in that last race - the one with really light wind!

My point has never been that the Vortex sails like a dog. Rather that in any racing, you are best sailing like against like. This is clearly not the easiest thing in handicap fleets but the Vortex's performance characteristics have a noticeably different profile to monos across the wind range.

Racing a Vortex in a F5 remains one of my all time favourite experiences. It's a cracking little boat, tough as old boots, the helm is light and the daggerboards stay where you put them. I just couldn't make it work in the light stuff and I don't think that was all down to me.

(PS do you still swap the cunningham and gnav controls over? Mine was 1089 - I think)

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Medway Maniac View Drop Down
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Post Options Post Options   Quote Medway Maniac Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 07 at 11:46am
Originally posted by Hector

Originally posted by Medway Maniac

 I always thought that the Contender needed huge adjustments, but the Vortex is easlily the most extreme in that regard.

Do I read the stats in your post above right?

i.e. Vortex  -8% to +4% ie 'swing of 12%

Contender -6% to +6% i.e. swing of 12%

Am I missing something - or is your statement above a tad  m*********g (self censored for fear of getting told off by E.D.!.) 

BTW I notice Mikes Vortex is second in your series ATM and according to the Y&Y report that's because of his consistent results -  So do you adjusted PYs for all races / days? I'd be interested to hear (perhaps in a new thread) about the swings for various classes, and what classes are most consistent.

Don't forget that offer of a pint.

I think we were talking about the light airs performance of the Vortex, and in my book -8% for the Vortex A and -9% for the (formerly) standard Vortex are larger corrections than -6% for the Contender. And those compared to a boat which is by no means a light airs flyer, the Laser 2000.

We use uncorrected PN's and I RO and write the reports for the Warm-Up Series. Mike has indeed been very consistent. But that's largely down to Mike - he is really getting it together lately, and has more 'time in boat' than a lot of the other competitors who are in new pairings or in new (for them) boats.

Plus, all races have so far been held in winds of at least marginal planing strength. No light airs yet - those were reserved for the Hoo Freezer, when, as I've mentioned, we caught Mike's five minute 'Fast Fleet' lead and passed him in the 3000, another boat that likes a bit of wind.

I shall look out for a floppy-eared dog on the Vortex stand, but I think it's going to be a hectic day: I've never yet left a Dinghy Show having seen all I wanted to, and I'm on the stand this year...

 

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Matt Jackson View Drop Down
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Post Options Post Options   Quote Matt Jackson Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 07 at 12:58pm

Originally posted by Medway Maniac

...I shall look out for a floppy-eared dog on the Vortex stand...

I thought we were going to leave the light wind perfomance thing alone now.... ahh, you mean Hector

Sorry couldn't resist.

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Medway Maniac View Drop Down
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Post Options Post Options   Quote Medway Maniac Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 07 at 8:57pm
Originally posted by Matt Jackson

I thought we were going to leave the light wind perfomance thing alone now.... ahh, you mean Hector

Sorry couldn't resist.

Very sharp! .  I hadn't intended any ambiguity.

 



Edited by Medway Maniac
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Hector View Drop Down
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Post Options Post Options   Quote Hector Quote  Post ReplyReply Direct Link To This Post Posted: 05 Mar 07 at 1:28pm

Tee Hee! That's actually very good.

I'll sort you out later Matt  

BTW when does Scaling re-open?

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